30CrMnSiA alloy steel plate belongs to medium carbon steel, the steel plate has high strength, but the welding performance is poor.30CrMnSiA steel plate has high strength and sufficient toughness after tempering. 30CrMnSiA has good machinability, tiny machining deformation and quite good fatigue resistance. It is used for shafts, piston parts and so on. It is used for various special wear-resistant spare parts of automobiles and aircrafts.
30CrMnSiA alloy steel plate chemical composition: carbon C: 0.28 ~ 0.34 Si: 0.90 ~ 1.20 manganese Mn: 0.80 ~ 1.10 sulfur S: allow residual content of ≤ 0.025 Phosphorus P: allow residual content of ≤ 0.025 Chromium Cr: 0.80 ~ 1.10 Nickel Ni: allow residual content of ≤ 0.030 Copper Cu: allow residual content of ≤ 0.025 0.025
30CrMnSiA alloy steel plate mechanical properties:
Tensile strength σb (MPa): ≥1080(110)
Yield strength σs (MPa): ≥ 835 (85) elongation δ5 (%): ≥ 10
Section shrinkage ψ (%): ≥45 Impact work Akv (J): ≥39
Impact toughness value αkv (J/cm²): ≥49(5)
Hardness ：≤229HB
30CrMnSiA alloy steel plate heat treatment specifications: quenching 880 ℃, oil-cooled; tempering 540 ℃, water-cooled, oil-cooled.
30CrMnSiA alloy steel plate delivery state to heat treatment (normalised, annealed or high temperature tempering) or non-heat treatment state delivery.
